b3fa6e6e65
...after f93ae0455c
"Check bridges with IWYU"
Change-Id: I01ca7b015cb9f4fc1dbff099c52e8240e1517270
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/163126
Tested-by: Thorsten Behrens <thorsten.behrens@allotropia.de>
Reviewed-by: Thorsten Behrens <thorsten.behrens@allotropia.de>
273 lines
8.8 KiB
C++
273 lines
8.8 KiB
C++
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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/*
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* This file is part of the LibreOffice project.
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*
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/.
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*
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* This file incorporates work covered by the following license notice:
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed
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* with this work for additional information regarding copyright
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* ownership. The ASF licenses this file to you under the Apache
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* License, Version 2.0 (the "License"); you may not use this file
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* except in compliance with the License. You may obtain a copy of
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* the License at http://www.apache.org/licenses/LICENSE-2.0 .
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*/
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#include <sal/config.h>
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#include <cassert>
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#include <cxxabi.h>
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#include <memory>
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#include <mutex>
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#include <typeinfo>
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#include <unordered_map>
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#include <utility>
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#include <vector>
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#include <dlfcn.h>
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#include <rtl/strbuf.hxx>
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#include <rtl/ustring.hxx>
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#include <sal/log.hxx>
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#include <typelib/typedescription.h>
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#include <o3tl/string_view.hxx>
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#include "rtti.hxx"
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#include "share.hxx"
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namespace {
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class Generated {
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public:
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virtual ~Generated() {};
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virtual std::type_info * get() const = 0;
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};
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class GeneratedPlain: public Generated {
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public:
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GeneratedPlain(std::unique_ptr<std::type_info> && info): info_(std::move(info)) {};
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std::type_info * get() const override { return info_.get(); }
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private:
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std::unique_ptr<std::type_info> info_;
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};
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class GeneratedPad: public Generated {
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public:
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GeneratedPad(std::unique_ptr<char[]> && pad): pad_(std::move(pad)) {};
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~GeneratedPad() override { get()->~type_info(); }
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std::type_info * get() const override final
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{ return reinterpret_cast<std::type_info *>(pad_.get()); }
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private:
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std::unique_ptr<char[]> pad_;
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};
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class RTTI
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{
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typedef std::unordered_map< OUString, std::type_info * > t_rtti_map;
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t_rtti_map m_rttis;
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std::vector<OString> m_rttiNames;
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std::unordered_map<OUString, std::unique_ptr<Generated>> m_generatedRttis;
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#if !defined ANDROID
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void * m_hApp;
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#endif
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public:
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RTTI();
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~RTTI();
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std::type_info * getRTTI(typelib_TypeDescription const &);
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};
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RTTI::RTTI()
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#if !defined ANDROID
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: m_hApp( dlopen( nullptr, RTLD_LAZY ) )
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#endif
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{
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}
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RTTI::~RTTI()
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{
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#if !defined ANDROID
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dlclose( m_hApp );
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#endif
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}
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std::type_info * RTTI::getRTTI(typelib_TypeDescription const & pTypeDescr)
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{
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OUString const & unoName = OUString::unacquired(&pTypeDescr.pTypeName);
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t_rtti_map::const_iterator iFind( m_rttis.find( unoName ) );
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if (iFind != m_rttis.end())
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return iFind->second;
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std::type_info * rtti;
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// RTTI symbol
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OStringBuffer buf( 64 );
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buf.append( "_ZTIN" );
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sal_Int32 index = 0;
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do
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{
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std::u16string_view token( o3tl::getToken(unoName, 0, '.', index ) );
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buf.append( static_cast<sal_Int32>(token.size()) );
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OString c_token( OUStringToOString( token, RTL_TEXTENCODING_ASCII_US ) );
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buf.append( c_token );
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}
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while (index >= 0);
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buf.append( 'E' );
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OString symName( buf.makeStringAndClear() );
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#if !defined ANDROID
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rtti = static_cast<std::type_info *>(dlsym( m_hApp, symName.getStr() ));
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#else
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rtti = static_cast<std::type_info *>(dlsym( RTLD_DEFAULT, symName.getStr() ));
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#endif
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if (rtti)
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{
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std::pair< t_rtti_map::iterator, bool > insertion (
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m_rttis.insert( t_rtti_map::value_type( unoName, rtti ) ) );
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SAL_WARN_IF( !insertion.second, "bridges", "key " << unoName << " already in rtti map" );
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return rtti;
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}
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// try to lookup the symbol in the generated rtti map
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auto iFind2( m_generatedRttis.find( unoName ) );
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if (iFind2 != m_generatedRttis.end())
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{
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// taking already generated rtti
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rtti = iFind2->second->get();
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return rtti;
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}
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// we must generate it !
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// symbol and rtti-name is nearly identical,
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// the symbol is prefixed with _ZTI
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char const * rttiName = symName.getStr() +4;
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SAL_INFO("bridges", "Generated rtti for " << rttiName);
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std::unique_ptr<Generated> newRtti;
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switch (pTypeDescr.eTypeClass) {
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case typelib_TypeClass_EXCEPTION:
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{
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typelib_CompoundTypeDescription const & ctd
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= reinterpret_cast<
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typelib_CompoundTypeDescription const &>(
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pTypeDescr);
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if (ctd.pBaseTypeDescription)
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{
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// ensure availability of base
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std::type_info * base_rtti = getRTTI(
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ctd.pBaseTypeDescription->aBase);
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m_rttiNames.emplace_back(OString(rttiName));
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std::unique_ptr<std::type_info> info(
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new __cxxabiv1::__si_class_type_info(
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m_rttiNames.back().getStr(), static_cast<__cxxabiv1::__class_type_info *>(base_rtti) ));
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newRtti.reset(new GeneratedPlain(std::move(info)));
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}
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else
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{
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// this class has no base class
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m_rttiNames.emplace_back(OString(rttiName));
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std::unique_ptr<std::type_info> info(
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new __cxxabiv1::__class_type_info(m_rttiNames.back().getStr()));
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newRtti.reset(new GeneratedPlain(std::move(info)));
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}
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break;
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}
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case typelib_TypeClass_INTERFACE:
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{
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typelib_InterfaceTypeDescription const & itd
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= reinterpret_cast<
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typelib_InterfaceTypeDescription const &>(
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pTypeDescr);
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std::vector<std::type_info *> bases;
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for (sal_Int32 i = 0; i != itd.nBaseTypes; ++i) {
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bases.push_back(getRTTI(itd.ppBaseTypes[i]->aBase));
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}
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switch (itd.nBaseTypes) {
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case 0:
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{
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m_rttiNames.emplace_back(OString(rttiName));
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std::unique_ptr<std::type_info> info(
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new __cxxabiv1::__class_type_info(
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m_rttiNames.back().getStr()));
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newRtti.reset(new GeneratedPlain(std::move(info)));
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break;
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}
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case 1:
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{
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m_rttiNames.emplace_back(OString(rttiName));
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std::unique_ptr<std::type_info> info(
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new __cxxabiv1::__si_class_type_info(
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m_rttiNames.back().getStr(),
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static_cast<
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__cxxabiv1::__class_type_info *>(
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bases[0])));
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newRtti.reset(new GeneratedPlain(std::move(info)));
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break;
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}
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default:
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{
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m_rttiNames.emplace_back(OString(rttiName));
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auto pad = std::make_unique<char[]>(
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sizeof (__cxxabiv1::__vmi_class_type_info)
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+ ((itd.nBaseTypes - 1)
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* sizeof (
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__cxxabiv1::__base_class_type_info)));
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__cxxabiv1::__vmi_class_type_info * info
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= new(pad.get())
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__cxxabiv1::__vmi_class_type_info(
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m_rttiNames.back().getStr(),
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__cxxabiv1::__vmi_class_type_info::__flags_unknown_mask);
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info->__base_count = itd.nBaseTypes;
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for (sal_Int32 i = 0; i != itd.nBaseTypes; ++i)
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{
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info->__base_info[i].__base_type
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= static_cast<
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__cxxabiv1::__class_type_info *>(
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bases[i]);
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info->__base_info[i].__offset_flags
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= (__cxxabiv1::__base_class_type_info::__public_mask
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| ((8 * i) << __cxxabiv1::__base_class_type_info::__offset_shift));
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}
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newRtti.reset(new GeneratedPad(std::move(pad)));
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break;
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}
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}
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break;
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}
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default:
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assert(false); // cannot happen
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}
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rtti = newRtti->get();
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auto insertion(m_generatedRttis.emplace(unoName, std::move(newRtti)));
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SAL_WARN_IF( !insertion.second, "bridges", "key " << unoName << " already in generated rtti map" );
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return rtti;
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}
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}
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std::type_info * x86_64::getRtti(typelib_TypeDescription const & type) {
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static RTTI theRttiFactory;
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static std::mutex theMutex;
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std::lock_guard aGuard(theMutex);
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return theRttiFactory.getRTTI(type);
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}
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/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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